boot meet deadlock at pppd link, what may cause wrong?

Dear Linux kernel programmers:

I use Debian distribution, after some recent update, upgrade, reboot, at
boot time into 2.4.20, it deadlock at pppd link

What may cause wrong? and in addition fsck /dev/hdc2
what else I should repair it(since fsck is no help at nextboot time dead lock)

Highly appreciate your help

Sincere Eric
www.linuxspice.com
linux/window pc for sale